Load balancing and HA for persistence chat pool

Hi,
I have 12000 users for lync 2013 . plan to have 2 persistence chat servers in a pool , have below queries regarding the same.
1. which type of load balancing will work for persistence chat pool.... DNS or HLB? if its HLB then is it mandatory to use HLB , agenda is to minimize the cost.
2. there is already 2 HLB for FE pool , one for external service and 1 for internal service.... can i use the same HLB for persistence chat pool?
3. does persistence chat pool have HA bydefault like FE and Edge pool?

1) DNS LB is fine: You can see them doing it here:http://technet.microsoft.com/en-us/library/jj205391.aspx
2) I suppose you could, but I'd suggest sticking with DNS as it's easy, supported, and it works.
3) Yes. I believe so.
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SWC Unified Communications

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Suresh Mohan wrote:
Hello,
We are wondering how load-balancing and failover of tpcall() work with
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>
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>
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>
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>
>
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          > ----------
          > C h r i s t o p h e r A . F r a s e r
          > Director, Technology
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Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support,
contact [email protected]
Eric Tao
TechNet Community Support

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"In short, load balancing tries to distribute traffic evenly over multiple paths, whereas, load sharing intends to do it (for the lack of a better term) equally. True load balancing is difficult to achieve. For example, let's say there were two links (100 mbps and 300 mpbs) and a router needed to send out 600 mbps of traffic. Load balancing would distribute the traffic evenly, sending 300 mbps on each link. On the contrary, load sharing would divide the traffic equally based on the available resources, sending 200 mbps on the slower link and 400 mbps on the faster one. "

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That's not how Cisco uses the terms, and generically they are often used almost interchangeably.
Cisco uses load balancing as the catch all for how a single L3 device routes across multiple paths to the same destination. Equal metrics or equal actual load distribution are not required. Most often, load balancing will be discussed with ECMP, but unequal path loading balancing will include Cisco's proprietary IGPs, such as EIGRP.
Cisco uses load sharing when using multiple paths when a single L3 devices doesn't normally route across multiple paths or multiple L3 devices are involved. Cisco load sharing discussions usually revolve around BGP.
Generically, I would say load balancing has more of a dynamic aspect to it, i.e. something is trying to actively balance traffic across multiple paths, while load sharing might mean multiple paths are utilized but not actively dynamically balanced.
I'm unsure what's your question with a production environment.

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http://www.ddbcinc.com/askDDBC

Load balancing and HA for persistence chat pool

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